/Conn in command line to override config location

Hi we run std 2008 and are trying to use the /Conn option from the command line to override the design time config.

We're reading info at sites like

http://dougbert.com/blog/post/understand-how-ssis-package-configurations-are-applied.aspx but dont see enough to get the sysntax correct.   I see a guid (DTSID) in the dtsx file that would appear to be the one associated with the design time config file.   But I'm not sure.  I tried braces, double quotes etc but so far no luck.   I wouldnt know what conn manager name to use cuz there doesnt seem to be one when you create a config via the wizard.

Here is essentially what I have...

c:\program files\Microsoft SQL Server\100\DTS\Binn>dtexec /f "u:..." /Conn {my guid};"my override path"

but I keep getting an error basically saying the connectiion "{my guid}" is not found.  Anybody know how to use this?

db042188